Electric ignition system.



G. HONOLD.

ELECTRIC IGNITION SYSTEM.

APPLICATION FILED SEPT. 21, 1911.

Patented Jan. 5, 1915.

//v TE'IWFUPTER w/mlesxs pose, it is preferable,

nruarn sirazrns iearnn'ir oo'rrrron Honors), or scrnrrcenr, GERMANY, ASSIGNOR T0 was rim/r or Bonner BOSCH, or srorreanr, GERMANY.

ELECTRIC onrrion SYSTEM.

rieaoels.

Application filed September 21, 1311.

ToaZZ whom it may concern:

Be it known that I, GOITLOB HONOLD, a subject of the Emperor of Germany, and residing at Stuttgart, Germany, have invented certain new and useful Improvements in Electric ignition Systems; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an electric ignition system for internal combustion engines, and particularly to a system for starting and running, wherein a mechanical interrupter and a buzzer, but no battery, are employed, and wherein the necessary retardation of. the ignition period during starting and the desirable advancement of the spark during/ running are obtained Without any mechanical adjustment whatever.

The invention consists in connecting a,

buzzer with a switch in electrical parallel with a mechanical interrupter, and connecting both in series with the inducing Winding of an ignition machine, so that by closing. the switch for starting the engine, the current from the ignition machine flowing to the buzzer When the mechanical inter-- rupter is open, is rapidly interrupted as a result of the vibration of the buzzer armature, thereby producing a rapid succession of sparks at the spark plug, and such sparks necessarily occur later in the stroke of the engine than the period of actuation of the interrupter due to the inductance of the buzzer Winding. During the running operation of the engine, the buzzer is cut out of operation by opening the switch, and then single sparks 'are produced at the spark plug by the currents from the ignition machine at advanced periods corresponding to the actuation of the interrupter. For this purthough not essential, to use a primary and secondary winding on the'armature of the ignition machine so as to increase the sparking potential.

It has been assumed heretofore, that the voltage generated by an ignition machine during the period of slow rotation in starting is not sufliciently high to produce a spark capable of igniting the compressed combustible mixture in the engine cylinders.

-Jl-Iowcver, recent experiments have demonstratedthat this observation is correct only in. a limited sense By a suitable construc- Specification of Letters Patent.

operation by Patented Jan, 5, 1915 Serial no. 650,604.

bustible mixture even during the starting period of the engine, but the energy of the spark is so slight that ignition is not certain with a single spark. It is known also, that ignition may be secured with quite feeble sparks rapidly succeeding each other, instead of a single spark of feeble character, and that such a series of sparks can be obtained by means of a buzzer. Furthermore, it is known that a buzzer may be connected to an ignition machine, as been employed only the buzzer remained in the circuit during the running period also, and therefore, by this arrangement the necessity of advancing the ignition period as the speed of the engine increased was always essential.

The present invention utilizes for the first time'the characteristic feature or a buzzer that the spark produced thereby is necessarily retarded, the efi'ect of which is that the mechanical interrupter may be adjusted for advanced ignition for both the starting and the running period of the engine. When the buzzer circuit is completed by in such manner that closing the switch during the starting period of the engine, the spark is retarded sufii ciently as a result of the inductance of the buzzer winding in spite of the advanced adjustment of the interrupter. When the engine gets under way, the buzzer iscut out of opening the switch, so that the desired advanced ignition during the running period of the engine is automatically established in consequence of the advanced adjustment of the interrupter.

The accompanying drawing illustrating my invention is a diagrammatic representation of the preferred arrangement.

The primary inducing winding 79 of the armature a of any suitable type of ignition machine is connected in electrical series with a switch or push button 6 and the buzzer winding 0 and buzzer armature f in one parallel branch,.and also in electrical series with the mechanical interrupter d in another parallel branch, the circuits being grounded as indicated. The primary winding 7) is periodically short-circuited and opened in the well known manner by the mechanical interrupter d mounted upon the-armature but this combination shaft. The secondary inducing winding slllld to the sparkfplug'e. The ignitionimachin'e" is operatively connected to the engine in the well'fknown manner.

WVhen the engine is to be started, th

. switch 6 is closed, and'as soon as the ignition machine begins to rotate, -the-w indmg c of the buzzer is-excited by the current from the primary winding p so long as the me-- chanical interrupterd is open, thereby vibrating the buzzer armature-j and producing a rapid succession offeeble sparks atthe spark plug 6 in the engine cylinder as a result of the current induced in the secondary winding .9. These sparks will be retarded relatively tothe stroke of the engine as a result of the inductance of the winding 0 of the buzzer, since the mechanical interrupter is adjusted to a correspondingly advanced position. -At the instant' of closure of the mechanical interrupter d the. primary winding 7) is short-circuitedand no current traverses the buzzer winding 0. When the engine has reached suflicient 1 speed, the

-- switch 6 is opened, and-the ignitionmachine a operates alone in conj unctionwith the mechanical interrupter d to produce single sparks of the proper character for ignition of the combustible mixture in the engine cylinders. These sparks will be produced at an advanced period relatively to the stroke of the engine since they follow without appreciable delay the period of opening of the mechanical inter'rupter-.,

It will beobvious that, if desired, the secondary Winding 8 of theignition machine may be omitted, although the describedar- Copies 01 this patent may be obtained for in cents each, by addressing Washington, D. 0.

gine, the vcombination with a spark plug the engine cylinderof an engine-drlven gnition machine connected to supply ignition an inducing winding included in two electrical paths enabling it to produce at said plug retarded and advanced ignition sparks during; the starting and running periods re-' 's ectively, tone of the said paths includlng an engine-driven mechanical interrupter ad justed to efl'ect advanced ignition during running, and the other of said paths includ ing 'a switch and a buzzer whose winding with a primary and a secondary winding connected in series with the plug, the primary Winding being included in two electrical paths, enabling it to induce in the secondary Winding voltages capable of producing at said plug retarded'and advanced ignition sparks during the starting and run,-' ning periods respectively; one of said paths including an engine-driven mechanical interrupter, adjusted to effect advancedignition during'running, and the other of said paths including a switch and a buzzer whose winding has electrical inductance such that upon the actuation of the said interrupter during the starting period a retarded succession of sparks is produced at the said plug, substantially as described.

50 ,voltages to said plug, said machine having has electrical inductance such that upon the In testimony whereof Iatfix my signature, I

in presence of two witnesses.

GOTTLOB HONOLD.

Witnesses:

REINHOLD ELw-nn'r, MAX Anscnn'rz.

the Commissioner of Patents, 

